One-flowered Broomrape, a native species, has been added to the USWildflowers database (06/30/2011.) Scientific name is Orobanche uniflora.  Photo below was taken in the Boise Foothills in Ada County, ID on June 21, 2011.  Go to the One-flowered Broomrape detail page  for more photos and information.

One-flowered Broomrape ; One-flowered Cancer Root, Naked Broomrape – Orobanche uniflora